-20.12% is the change from 835 to 667
Calculation steps:
[( 667 - 835 ) ÷ 835] x 100 = -20.12%
Formula
Percentage change = [(667 - 835) / 835] x 100
Subtract the new number by the original number
667 - 835 = -168
-168 ÷ 835 = -0.20119760479041915
-0.20119760479041915 x 100 = -20.12%